| Study on Properties of Desulfurized Rubber Powder Modified Asphalt |
| Received:June 22, 2022 Revised:June 22, 2022 |
| DOI：10.12136/j.issn.1000-890X.2023.10.0796 |
| Key Words: desulfurized rubber powder；modified asphalt；thermal stability；high-temperature performance；low-temperature performance |
| Author Name | Affiliation | E-mail | | ZHEN Shaohua | Tianjin Academy of Transportation Sciences | 1150748228@qq. com | | CHUO Eryong | Tianjin Academy of Transportation Sciences | | | LIU Lu | Tianjin Academy of Transportation Sciences | | | JI Yuping | Tianjin Academy of Transportation Sciences | | | ZHANG Wenbo | Tianjin Academy of Transportation Sciences | |
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| Abstract: |
| The properties of desulfurized rubber powder modified asphalt were studied.The penetration，softening point，ductility and viscosity at 180 ℃ of modified asphalt with different content of desulfurized rubber powder were tested to determine the optimal content of desulfurized rubber powder.Then thermal stability and performance decay test，high-temperature dynamic shear rheological test and low-temperature bending creep test were carried out for modified asphalt with the optimal content of desulfurized rubber powder.The results showed that the optimal content of desulfurized rubber powder was 24% of the mass of base asphalt.The storage temperature of desulfurized rubber powder modified asphalt should be set at 165～175 ℃，and the storage time should not exceed 48 h.Compared with ordinary rubber powder modified asphalt and base asphalt，under the same temperature conditions，the complex shear modulus，anti-rutting factor and creep rate of desulfurized rubber powder modified asphalt increased，while the phase angle and stiffness modulus decreased，indicating that desulfurized rubber powder could effectively improve the high-temperature and low-temperature performance of modified asphalt. |
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